Posted by Rob1 on February 26, 2001 at 15:50:18:
I thought that, since we are posting interesting scuba-related articles, that people might enjoy this. I saw it when I got this month's Smithsonian Magazine.
Its short on details, but the concept is worth noting.
http://www.smithsonianmag.si.edu/smithsonian/issues01/mar01/mall_mar01.html